Discover French Guiana
Very few tourists make it to this small South American country. It's a shame, because nature in French Guiana is still pure and unspoiled.
Matoury in September sees very high temperatures, with highs around 32°C (90°F) and overnight lows of 24°C (75°F). It's the driest month of the year, with very little rainfall to worry about.
If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Matoury.
Pick a month to see the average temperature, rainfall and sunshine in Matoury - and find the best time to visit.
46-year average (1976-2025)
Based on our historical records, temperatures in Matoury typically stay consistent throughout September, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 23°C (73°F).
46-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Matoury spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Our historical data for Matoury spans 1992 to 2026, revealing these weather extremes.
Find out more about the weather in French Guiana and which places have the best travel conditions in this month. See all of French Guiana in September →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Warm but pleasant conditions in Matoury in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Wet weather is likely, so pack waterproof gear for multiple rainy days. Expect water temperatures of around 28°C (82°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Matoury climate overview or explore weather in French Guiana.
Where to go in September - average daytime high across popular destinations.
Need travel inspiration? Check out our bucket list articles and be inspired.
Discover French Guiana
Very few tourists make it to this small South American country. It's a shame, because nature in French Guiana is still pure and unspoiled.
Visit the Rainbow Mountains
The Rainbow Mountain (Vinicunca) is acolored rainbow mountain that will steal your heart forever and the view from the top will take your breath away.
The 10 most alternative cities in South America
Discover South America's top 10 alternative cities! From Valparaíso's vibrant streets to La Paz's high-altitude charm and Medellín's innovative spirit.
The 5 most tranquil retreats in the Amazon Rainforest, Brazil
Discover top sustainable lodges in the Amazon. Enjoy unique wildlife, eco-friendly stays, and immersive experiences at Anavilhanas, Cristalino, and more.